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Comparison of advanced turboprop and turbofan airplanesResults of a parametric study to determine the effects of design variables and penalties on the fuel efficiency of Mach 0.8, 125-passenger, advanced turboprop airplanes show that propeller-wing interference penalty has a major effect. Propeller tip speed has a minor effect, and could be decreased to alleviate the noise problem without significant effects on fuel efficiency. The anticipated noise levels produced by the propfan will require additional acoustical treatment for the fuselage; this additional weight can have a significant effect on fuel efficiency. The propfan advantage over an equivalent technology turbofan is strongly dependent on the interference penalty and acoustical treatment weight. Lowering the cruise Mach number to around 0.73 would result in greatly increased fuel efficiency.
Document ID
19830027751
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Johnson, V. S. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 4, 2013
Publication Date
September 1, 1983
Subject Category
Aircraft Design, Testing And Performance
Report/Patent Number
NAS 1.15:85692
NASA-TM-85692
AIAA PAPER 83-1823
Report Number: NAS 1.15:85692
Report Number: NASA-TM-85692
Report Number: AIAA PAPER 83-1823
Meeting Information
Meeting: AIAA Appl. Aerodyn. Conf.
Location: Danvers, MA
Country: United States
Start Date: July 13, 1983
End Date: July 15, 1983
Accession Number
83N36022
Funding Number(s)
PROJECT: RTOP 505-43-43-01
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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